Seachem pH Alert
Continuously monitors pH in freshwater
Seachem sensor technology
No tests, no strips
Lasts up to 4 times as long as competing products

pH Alert' is a unique color device designed to be placed in the aquarium or filter and monitor pH continuously. A sensor changes color reversibly from yellow to orange to red alerting you to shifts in pH levels between 5.4 and 8.0. Freshwater use only.

Simply place pH Alert' visibly anywhere in the aquarium or filter and match the sensor color to the corresponding pH reading on the color wheel. It's that easy. No chemicals or test procedures are required. When first put in service, response time will be about 30 minutes. Thereafter, pH shifts will register within ten minutes.

No care is required beyond removing algae with a clean, soft material. Do not use bleach, soap, detergents or hard objects to clean the sensor. Some dye medications may discolor the sensor. For maximum sensitivity, the unit should be read under natural daylight or daylight simulating light. Sensor exhaustion is indicated by a visible fading or washing out of sensor color. Once exhausted, it is time to replace pH Alert'
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